diff --git a/README.md b/README.md
index cd31b9f..1084bd2 100644
--- a/README.md
+++ b/README.md
@@ -450,6 +450,7 @@ Your agent can then read specs, plans, work items, and tech debt and (with a wri
 - [x] **v0.4.6 — Layers & model boundaries** (see [`docs/specs/layers-and-boundaries-spec.md`](docs/specs/layers-and-boundaries-spec.md)): asset `layer` field with display-time type defaults, Atlas layer columns (auto for single-product scope), `move_asset` model refactoring, boundary rule + layer taxonomy in the MCP modeling guide (42 tools)
 - [x] **[v0.4.7 — Native Specs](https://github.com/SylonZero/CodePlans/releases/tag/v0.4.7):** first-class versioned specs, asset/plan/work-item associations, pinned delivery receipts, legacy URL import, and consistent GFM rendering
 - [x] **[v0.5.0 — Product Wiki](https://github.com/SylonZero/CodePlans/releases/tag/v0.5.0):** full-window asset pages and document readers, product-wide search, contextual links, versions, timestamps, and creator/editor attribution
+- [x] **[v0.5.1 — Deletion, cascade safety & audit trail](https://github.com/SylonZero/CodePlans/releases/tag/v0.5.1):** MCP delete tools for tasks, work items, plans & releases with blast-radius disclosure; confirmation dialogs on every destructive UI action; a centralized audit log covering every mutation across the UI and MCP; standardized creator/updater attribution with a data backfill for pre-existing rows; role-based delete authorization (org owner/admin vs. creator-or-assignee-only for everyone else); and a fixed privilege-escalation gap in team role management
 - [ ] **Planned — Reconciliation & round-trip engineering** (see [`docs/specs/asset-record-spec.md`](docs/specs/asset-record-spec.md)): agent reconciliation proposals, release publishing
 - [ ] AI-assisted effort estimation
 - [ ] Billing / subscription management (hosted tier, optional & feature-flagged)
diff --git a/package.json b/package.json
index ec00ace..214e3ce 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "codeplans",
-  "version": "0.5.0",
+  "version": "0.5.1",
   "description": "Manage and track coordinated changes across your software architecture.",
   "author": "Sai Prakash <sylonzero@gmail.com>",
   "homepage": "https://codeplans.ai",